How is the sweetness level of coffee typically adjusted at Dunkin Donuts?

The sweetness level of coffee at Dunkin Donuts is typically adjusted by using sugar or artificial sweeteners. This method allows for direct control over the level of sweetness that can be added based on personal preferences. Customers can choose to add granulated sugar, flavor shots, or various artificial sweeteners to achieve their desired taste. This approach is popular because it provides flexibility for customers to tailor their beverages according to their individual sweetness preferences, making their coffee experience more enjoyable.

Adjusting brew time, changing the coffee bean type, or adding spices would not effectively customize the sweetness of coffee. Brew time can influence the strength and flavor profile but not the sweetness directly. The type of coffee bean affects flavor and aroma rather than sweetness. Adding spices can enhance taste complexity but does not specifically increase sweetness.